Hi I used the command "ip -6 addr add 2001:DB8:CAFE:1111::12/64 dev eth0" to add ipv6 address and can see it in ifconfig but can't ping it Why? Thank you # ping6 2001:db8:cafe:1111::12 PING 2001:db8:cafe:1111::12(2001:db8:cafe:1111::12) 56 data bytes >From ::1 icmp_seq=1 Destination unreachable: Address unreachable >From ::1 icmp_seq=2 Destination unreachable: Address unreachable >From ::1 icmp_seq=3 Destination unreachable: Address unreachable >From ::1 icmp_seq=5 Destination unreachable: Address unreachable >From ::1 icmp_seq=6 Destination unreachable: Address unreachable >From ::1 icmp_seq=7 Destination unreachable: Address unreachable >From ::1 icmp_seq=9 Destination unreachable: Address unreachable >From ::1 icmp_seq=10 Destination unreachable: Address unreachable >From ::1 icmp_seq=11 Destination unreachable: Address unreachable